diff --git a/platform/workspaceModel-ide/src/com/intellij/workspace/legacyBridge/intellij/LegacyBridgeModifiableModelCommitterService.kt b/platform/workspaceModel-ide/src/com/intellij/workspace/legacyBridge/intellij/LegacyBridgeModifiableModelCommitterService.kt
index 1c4e2177b243..cd2c039f90ff 100644
--- a/platform/workspaceModel-ide/src/com/intellij/workspace/legacyBridge/intellij/LegacyBridgeModifiableModelCommitterService.kt
+++ b/platform/workspaceModel-ide/src/com/intellij/workspace/legacyBridge/intellij/LegacyBridgeModifiableModelCommitterService.kt
@@ -3,16 +3,25 @@ package com.intellij.workspace.legacyBridge.intellij
 import com.intellij.openapi.module.ModifiableModuleModel
 import com.intellij.openapi.roots.ModifiableRootModel
 import com.intellij.openapi.roots.impl.ModifiableModelCommitterService
+import com.intellij.workspace.api.TypedEntityStorageBuilder
+import com.intellij.workspace.ide.WorkspaceModel
 import org.jetbrains.annotations.ApiStatus
 
 @ApiStatus.Internal
 internal class LegacyBridgeModifiableModelCommitterService : ModifiableModelCommitterService {
   override fun multiCommit(rootModels: MutableCollection<out ModifiableRootModel>, moduleModel: ModifiableModuleModel) {
-    // TODO Add all diffs at once
     // TODO Naive impl, check for existing contact in com.intellij.openapi.module.impl.ModuleManagerImpl.commitModelWithRunnable
+    val diffs = mutableSetOf<TypedEntityStorageBuilder>()
     for (rootModel in rootModels) {
-      if (rootModel.isChanged) rootModel.commit() else rootModel.dispose()
+      if (rootModel.isChanged) {
+        diffs += (rootModel as LegacyBridgeModifiableRootModel).collectChanges() ?: continue
+      }
+      else rootModel.dispose()
+    }
+    diffs += (moduleModel as LegacyBridgeModifiableModuleModel).collectChanges()
+
+    WorkspaceModel.getInstance(moduleModel.project).updateProjectModel {
+      diffs.forEach(it::addDiff)
     }
-    moduleModel.commit()
   }
 }
\ No newline at end of file
diff --git a/platform/workspaceModel-ide/src/com/intellij/workspace/legacyBridge/intellij/LegacyBridgeModifiableModuleModel.kt b/platform/workspaceModel-ide/src/com/intellij/workspace/legacyBridge/intellij/LegacyBridgeModifiableModuleModel.kt
index be04a4d998ec..764343798d75 100644
--- a/platform/workspaceModel-ide/src/com/intellij/workspace/legacyBridge/intellij/LegacyBridgeModifiableModuleModel.kt
+++ b/platform/workspaceModel-ide/src/com/intellij/workspace/legacyBridge/intellij/LegacyBridgeModifiableModuleModel.kt
@@ -164,6 +164,14 @@ internal class LegacyBridgeModifiableModuleModel(
     myNewNameToModule.isNotEmpty()
 
   override fun commit() {
+    val diff = collectChanges()
+
+    WorkspaceModel.getInstance(project).updateProjectModel {
+      it.addDiff(diff)
+    }
+  }
+
+  fun collectChanges(): TypedEntityStorageBuilder {
     ApplicationManager.getApplication().assertWriteAccessAllowed()
 
     val storage = entityStoreOnDiff.current
@@ -184,9 +192,7 @@ internal class LegacyBridgeModifiableModuleModel(
       }
     }
 
-    WorkspaceModel.getInstance(project).updateProjectModel {
-      it.addDiff(diff)
-    }
+    return diff
   }
 
   override fun renameModule(module: Module, newName: String) {
diff --git a/platform/workspaceModel-ide/src/com/intellij/workspace/legacyBridge/intellij/LegacyBridgeModifiableRootModel.kt b/platform/workspaceModel-ide/src/com/intellij/workspace/legacyBridge/intellij/LegacyBridgeModifiableRootModel.kt
index 7ef1eb0b8ba0..0bbbaedb5e25 100644
--- a/platform/workspaceModel-ide/src/com/intellij/workspace/legacyBridge/intellij/LegacyBridgeModifiableRootModel.kt
+++ b/platform/workspaceModel-ide/src/com/intellij/workspace/legacyBridge/intellij/LegacyBridgeModifiableRootModel.kt
@@ -20,11 +20,9 @@ import com.intellij.openapi.vfs.VirtualFile
 import com.intellij.util.isEmpty
 import com.intellij.workspace.api.*
 import com.intellij.workspace.ide.WorkspaceModel
-import com.intellij.workspace.legacyBridge.libraries.libraries.LegacyBridgeLibrary
-import com.intellij.workspace.legacyBridge.libraries.libraries.LegacyBridgeLibraryImpl
-import com.intellij.workspace.legacyBridge.libraries.libraries.LegacyBridgeLibraryModifiableModelImpl
-import com.intellij.workspace.legacyBridge.libraries.libraries.LegacyBridgeModifiableBase
+import com.intellij.workspace.legacyBridge.libraries.libraries.*
 import com.intellij.workspace.legacyBridge.roots.LegacyBridgeModifiableContentEntryImpl
+import com.intellij.workspace.legacyBridge.typedModel.library.LibraryViaTypedEntity
 import com.intellij.workspace.legacyBridge.typedModel.module.LibraryOrderEntryViaTypedEntity
 import com.intellij.workspace.legacyBridge.typedModel.module.OrderEntryViaTypedEntity
 import com.intellij.workspace.legacyBridge.typedModel.module.RootModelViaTypedEntityImpl
@@ -293,9 +291,9 @@ class LegacyBridgeModifiableRootModel(
     }
   }
 
-  override fun commit() {
+  fun collectChanges(): TypedEntityStorageBuilder? {
     assertModelIsLive()
-    if (!isChanged) return
+    if (!isChanged) return null
 
     if (extensionsDelegate.isInitialized() && extensions.any { it.isChanged }) {
       val element = Element("component")
@@ -343,6 +341,12 @@ class LegacyBridgeModifiableRootModel(
 
     disposeSkippingLibraries()
 
+    return diff
+  }
+
+  override fun commit() {
+    val diff = collectChanges() ?: return
+
     val moduleDiff = module.diff
 
     if (moduleDiff != null) {